Optical Illusion of 3 Terrain Vehicles

Before I explain today’s optical illusion, I’d like to remind you of our previous similar illusions. This is because I find today’s example better than all the rest of the same type. First time we covered “Relative Sizes” illusion of this sort (Perspective Illusion), was all the way back in April 2006. The illusion was titled “Monsters Illusion” and was animated picture. Following were more real-life looking (although all are photoshoped because of their nature) – check Relative Sized Nuns and Ebbinghaus illusion. You can probably find few more I missed inside the right category, like “3 Soldiers“, “3 Little Piglets“.
The effect: three terrain vehicles below appear different in size because of the surrounding environment. This is because of depth perception our brain automatically processes. Now take something to measure them, and you’ll realize they are exactly the same.